US5873999A - Sieving and filtration screen - Google Patents
Sieving and filtration screen Download PDFInfo
- Publication number
- US5873999A US5873999A US08/920,463 US92046397A US5873999A US 5873999 A US5873999 A US 5873999A US 92046397 A US92046397 A US 92046397A US 5873999 A US5873999 A US 5873999A
- Authority
- US
- United States
- Prior art keywords
- screen
- polymeric coating
- polymeric
- coating
- discontinuous pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 11
- 238000007873 sieving Methods 0.000 title claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 238000007688 edging Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000007650 screen-printing Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 5
- 229920001944 Plastisol Polymers 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920000126 latex Polymers 0.000 claims description 4
- 239000004999 plastisol Substances 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 4
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920006397 acrylic thermoplastic Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims 2
- 239000004744 fabric Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000013023 gasketing Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 244000286663 Ficus elastica Species 0.000 description 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 235000012773 waffles Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/012—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/50—Means for dissipating electrostatic charges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/52—Filter identification means
Definitions
- This invention relates to a new and improved sieving screen or filtration screen and, more particularly, screens which feature the use of a flexible, chemical resistant polymeric coating as an edging or other enhancement, such as identification or informative indicia on the screen.
- Screens which may be used as a sieve screen and/or a filter screen are generally comprised of a plurality of openings or open spaces which may be produced in a variety of known ways such as being in the form of fabric comprised of woven, interlaced or intertwined thread, cord or wire, or may be molded, stamped, needled, etched and the like, for forming a gauze or mesh material which can be used for separating coarse and fine particles from each other, or for removing particulate or viscous matter from fluids, including liquids and/or gases.
- United Kingdom Patent 482,622 discloses a filtration device comprised of a wire gauze or mesh having a pair of peripheral gasket members of india rubber disposed on opposite marginal edges thereof and then vulcanized to form a continuous coating intimately bonded to the wire gauze. There is no teaching of patterned or intermittent indicia nor discontinuous portions for allowing electrical contact for grounding of the screen, nor teaching of providing informative data and the like to the screen area or marginal portions thereof.
- U.S. Pat. No. 3,382,985 discloses a filter element in the form of a woven cloth of polypropylene, nylon, Acrilon or polyurethane fiber, fiber glass or cotton with an integral gasket which eliminates gasket grooves.
- the gasket material may also consist of woven polymeric fibers using a resilient or spongy, e.g., waffle, trilock or honeycomb bonded with an adhesive, e.g., epoxy adhesive, liquid neoprene or latex.
- the gasket may also be sewn to the filter element with polymeric thread.
- the gasket material is continuous throughout and the patent does not teach or suggest a discontinuous coated edge portion nor indicia of any kind..
- U.S. Pat. No. 3,332,557 discloses a filter element comprising a wire mesh screen and a peripheral or marginal anchoring strip of greater thickness than the wire mesh.
- the gasket portion is disclosed as being in the form of a molded ring, which may be rubber or the like.
- the invention is comprised of a novel sieving screen or filtration screen, and processes for producing the same, which features the use of a flexible, chemical resistant, intermittent, polymeric coating as an edging material and/or for providing indicia for identification purposes to show, for example, the source of the product, producer's or customer's logos, trade names, part numbers, indications and precautions for use, and any other forms of instruction and/or information, as well as providing an intermittent or discontinuous coating to allow for electrical grounding with a conventional filter clamp or the like.
- Typical end use applications for such screens include, but are not limited to, sieving of dry powders, solid/fluid separation, delumping, screening, dry powders sifting, filtering and the like.
- FIG. 1 shows a Prior Art form of sieve or filter screen.
- FIG. 2 is a sectional view of the Prior Art taken on line 2--2 of FIG. 1.
- FIG. 3 is a plan view of a sieve or filter screen in accordance with the present invention.
- FIG. 4 is a sectional view taken on line 4--4 of FIG. 3.
- FIG. 5 is a fragmentary sectional view of a sieve or filter in accordance with the present invention showing a marginal portion thereof secured between a pair of clamp elements.
- FIGS. 1 and 2 One form of prior art sieve or filter screen, generally indicated by the numeral 10, is shown in FIGS. 1 and 2 and includes a central mesh portion 12, a peripheral marginal portion 14 and stitching 16 for sewing and securing the marginal portion 14 to the central portion 12.
- the conventional cloth or felt marginal portions, or edgings create a large assortment of problems, which problems are overcome by the present invention.
- the invention is comprised of a sieve or filter screen, generally indicated by the numeral 20, which is comprised of a central foraminous, gauze or mesh section 22 which may be produced in any known fashion, such as being in the form of fabric comprised of woven, interlaced or intertwined thread, cord or wire, or the like, or may be molded, stamped, needled, etched, or the like.
- the central section 22 is generally surrounded by a peripheral marginal portion 24 which features the use of a flexible, chemical resistant polymeric coating 26 which can be applied in the form of a continuous edging 28 or as a selective enhancement at the marginal edge and/or elsewhere on the screen.
- Polymeric coating 26 can be applied to screen 20 using different processes or methodologies including, but not limited to, brushing, rolling, squeegee, spraying, direct screen printing, indirect screen printing, indirect screen printing (heat transfer method), radio frequency sealing or using thermal fusion technology.
- the presently preferred application method is the use of screen printing in which the polymeric coating 26 is applied, or printed, directly upon mesh section 22 or, alternatively, by first printing the coating 26 onto a suitable transfer paper and then thermally fusing the printed image directly onto mesh section 22.
- the present invention allows for coating 26 to be applied to mesh section 22, of screen 20, in a pattern configuration with the pattern addressing some requirement for functionality including, but not limited to one or more of: gasketing, friction surfacing, electrical continuity, cleanability, washability, screen fraying resistance, appearance, identification, abrasion resistance, mechanical reinforcement, and flexibility.
- a continuous coating pattern such as is shown at edging 28, provides for enhanced screen fraying resistance. Intermittent coating patterns can effectively, and simultaneously, satisfy numerous performance requirements such as: friction surfacing, marking, identification, coating minimization, screen cloth fraying protection, cleanability, washability, rapid drying and intermittent electrical continuity or chassis earthing where desirable or required.
- FIGS. 3, 4 and 5 can be accomplished by methodologies including, but not limited to, stencil, mechanical printing, Screen printing, articulating spray head or masking.
- the presently preferred pattern technology is screen printing.
- Edging patterns of all types are possible including, but not limited to, solid areas, stripes, dots, squares, rectangles or any other shape possible within the limits of the application technology used.
- An important feature of the invention is the simultaneous inclusion, during the coating or application process, of logos, trade names, trademarks, part numbers, serial numbers, addresses, telephone, facsimile and e-mail numbers, and other commercial data and instructional markings as part of the coating process.
- Polymeric coating 26 is selected to be appropriate for the intended end use.
- Various coatings 26 can be selected, including: aqueous or non-aqueous emulsions or solutions of latex, acrylics, polyvinylchloride (PVC), natural rubber, rubber compounds, plastisols or polyurethane.
- Other possible coatings 26 can include heat fusible plastics, two-part epoxies or other catalyzed polymeric coating systems.
- Coatings 26 may also have dielectric or electrically conductive properties depending upon end use.
- the materials for coatings 26 may be selected to have properties suitable for direct or indirect contact with food products, pharmaceutical products, potable water or health care products all of which may require Food and Drug Administration (FDA) or United States Department of Agriculture (USDA) usage acceptance.
- the presently preferred material for coating 26 is a liquid, vinyl plastisol which is particularly suitable for both the preferred screen printing process and the thermal fusion process.
- the present invention is readily adaptable to various use applications including, but not limited to, dry powders sieving, solid/liquid separation, delumping, screening, dry powders sifting and filtering, including the separation of particulate matter from fluid streams of liquid and/or gas.
- the present invention is appropriate for an infinite range of sizes and shapes within the scope of the particular manufacturing methodology used.
- the invention allows for an unlimited number of patterns or shapes developed initially through graphics arts technology typical to the screen printing technology. Sizes for use with screen printing will range from approximately less than 0.5 inches square up to or greater than 70.0 inches overall in any dimension.
- the invention is also appropriate for use on numerous mesh sections 22 for screen, sieve or filter substrates, including: woven polyester, woven nylon, woven carbonized (conductive) nylon, woven carbonized (conductive) polyester, woven polypropylene, woven polyethylene, woven stainless steel, copper or other metals, and woven meshes such as acrylic, PVC, PVDF and fluoroplastics.
- the invention also is appropriate for the mesh section 22 of non-woven screening, sieving and filtering and filtering substrates such as extruded meshes, felts, spun bonded papers, needled felted fabrics and other non-woven materials.
- the invention is particularly appropriate for use of numerous colors during the manufacturing process of coatings 26 which may be provided in virtually any color or colors.
- a particular color can be selected for a screen/sieve/filter edging 28 to indicate a particular feature thereof. Examples are: a particular color for polyester, nylon, stainless steel, etc.; a particular color for size identification, such as 15 inches, 18 inches, 24 inches, etc.; a particular color used as a trademark; and a particular color as an indicator of end use, for example, food contact versus non-food contact, and electrically conductive versus non-electrically conductive.
- a screen 20, formed in accordance with present invention is shown mounted upon a conventional tubular metal ring 40 and help in place by a conventional clamping ring 42.
- the coating 26, and particularly edging 28, provide for superior slip resistance between ring 40 and clamp 42. Intermittent and incidental contact of the screen 20 with the metal ring 40 allows for electrical conductivity where conductive screens, or a conductive coating, are utilized for dissipation of static charges and the like.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combined Means For Separation Of Solids (AREA)
- Filtering Materials (AREA)
Abstract
Description
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/920,463 US5873999A (en) | 1997-08-29 | 1997-08-29 | Sieving and filtration screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/920,463 US5873999A (en) | 1997-08-29 | 1997-08-29 | Sieving and filtration screen |
Publications (1)
Publication Number | Publication Date |
---|---|
US5873999A true US5873999A (en) | 1999-02-23 |
Family
ID=25443789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/920,463 Expired - Fee Related US5873999A (en) | 1997-08-29 | 1997-08-29 | Sieving and filtration screen |
Country Status (1)
Country | Link |
---|---|
US (1) | US5873999A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2822082A1 (en) * | 2001-03-14 | 2002-09-20 | Filtrauto | Fluid filter system with interchangeable cartridge has surround with sealing surface having relief motif matching same on support |
US20030000874A1 (en) * | 2001-06-29 | 2003-01-02 | Stephen Proulx | Laminated edge filter structure and method of making |
US20030042179A1 (en) * | 1998-10-30 | 2003-03-06 | Adams Thomas C. | Vibratory separator screens |
US6662955B1 (en) * | 1998-08-11 | 2003-12-16 | Food Equipment Technologies Company Inc. | Beverage ingredient filter and assembly |
US20040154148A1 (en) * | 2002-12-30 | 2004-08-12 | Anders Nilsson | Papermaker's and other industrial process fabric characteristics by calendering |
US20040192129A1 (en) * | 2003-03-31 | 2004-09-30 | Mcgregor Gordon L. | Insect screen with improved optical properties |
US20040188042A1 (en) * | 2002-02-06 | 2004-09-30 | Andersen Corporation | Reduced visibility insect screen |
US20040198115A1 (en) * | 2003-03-31 | 2004-10-07 | Mcgregor Gordon L. | Insect screen with improved optical properties |
US6843379B2 (en) | 1999-09-14 | 2005-01-18 | Outokumpu Oyj | Corrosion-resistant filter element |
US20050086883A1 (en) * | 2003-10-24 | 2005-04-28 | Wade Rodney G. | Rain head |
US20050098277A1 (en) * | 2002-02-06 | 2005-05-12 | Alex Bredemus | Reduced visibility insect screen |
WO2004088078A3 (en) * | 2003-03-31 | 2005-12-08 | Gore Enterprise Holdings Inc | Insect screen with improved optical properties |
US20050279065A1 (en) * | 2004-06-17 | 2005-12-22 | Randy Simmons | Air intake filter screen assembly including a stand-off frame for preventing hail damage to surface coils of an associated air intake unit |
US20060016744A1 (en) * | 2004-07-20 | 2006-01-26 | Miner Daniel P | Pump inlet screen |
US20060169426A1 (en) * | 2003-03-31 | 2006-08-03 | Mcgregor Gordon L | Durable insect screen with improved optical properties |
US20070095956A1 (en) * | 2005-10-27 | 2007-05-03 | Swan Trevor W | Spray nozzle apparatus and method |
US20100025315A1 (en) * | 2005-10-05 | 2010-02-04 | James Aaron Smith | Filter medium for strainers used in nuclear reactor emergency core cooling systems |
US20120107507A1 (en) * | 2006-06-30 | 2012-05-03 | Helmy Nashat N | Method of manufacturing a sifting screen |
CN104105908A (en) * | 2012-01-25 | 2014-10-15 | Nok株式会社 | Metal substrate gasket with filter function and manufacturing method therefor |
US20160052095A1 (en) * | 2011-08-09 | 2016-02-25 | Randy Simmons | Assembly, kit and method for securing a covering to an air intake face |
CN109276922A (en) * | 2018-09-14 | 2019-01-29 | 浙江万华不锈钢有限公司 | A kind of combined single-side stainless steel filter plate |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB482622A (en) * | 1936-12-15 | 1938-04-01 | Fairey Aviat Co Ltd | Improvements in or relating to wire gauze filters and the like |
US2316526A (en) * | 1941-07-26 | 1943-04-13 | Albert W Mcdonald | Plastic frame for screens, ventilators, and windows |
GB1045309A (en) * | 1962-12-04 | 1966-10-12 | Fram Corp | Filter cartridges |
US3300952A (en) * | 1962-07-13 | 1967-01-31 | Res Prod Corp | Air filter having ductile metal frame with integral lock |
US3310098A (en) * | 1966-08-12 | 1967-03-21 | Universal Oil Prod Co | Catalytic infra-red heater |
US3322557A (en) * | 1964-05-11 | 1967-05-30 | Ncr Co | Thermo-copy system |
US3332557A (en) * | 1964-05-26 | 1967-07-25 | Pall Corp | Wire mesh filter element with anchoring rim |
US3341013A (en) * | 1964-05-07 | 1967-09-12 | Arthur K Moulton | Screen structure |
US3382985A (en) * | 1966-01-04 | 1968-05-14 | Pabst Brewing Co | Filter elements having integral gasket means |
US4422861A (en) * | 1982-02-05 | 1983-12-27 | American Optical Corporation | Aerosol filter cartridge |
US4497709A (en) * | 1982-09-03 | 1985-02-05 | Albany International Corp. | Two piece screen filter |
US4601820A (en) * | 1984-03-23 | 1986-07-22 | Filtertek, Inc. | Low-profile inline filter |
US4740413A (en) * | 1986-11-07 | 1988-04-26 | Lenser Verwaltungs-Gmbh | Bonded synthetic-resin filter plate and method of making same |
US4961849A (en) * | 1988-12-19 | 1990-10-09 | Hull Harold L | Magnetically attached filter |
US4986904A (en) * | 1988-12-20 | 1991-01-22 | Schleicher & Schuell Gmbh | Color coded disposable filter holder |
US5102436A (en) * | 1990-10-03 | 1992-04-07 | Andreas Stihl | Prefilter for an air filter of an internal combustion engine |
US5169524A (en) * | 1990-11-27 | 1992-12-08 | Horst Meiritz | Filter ring |
US5599449A (en) * | 1994-10-21 | 1997-02-04 | Robert Bosch Gmbh | Tubular elastic frame with a continuous slot spanned by a filter material |
US5651888A (en) * | 1992-12-16 | 1997-07-29 | Kubota Corporation | Filtration membrane cartridge |
US5690826A (en) * | 1996-05-10 | 1997-11-25 | Cravello; William Myron | Shaker screen assembly |
-
1997
- 1997-08-29 US US08/920,463 patent/US5873999A/en not_active Expired - Fee Related
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB482622A (en) * | 1936-12-15 | 1938-04-01 | Fairey Aviat Co Ltd | Improvements in or relating to wire gauze filters and the like |
US2316526A (en) * | 1941-07-26 | 1943-04-13 | Albert W Mcdonald | Plastic frame for screens, ventilators, and windows |
US3300952A (en) * | 1962-07-13 | 1967-01-31 | Res Prod Corp | Air filter having ductile metal frame with integral lock |
GB1045309A (en) * | 1962-12-04 | 1966-10-12 | Fram Corp | Filter cartridges |
US3341013A (en) * | 1964-05-07 | 1967-09-12 | Arthur K Moulton | Screen structure |
US3322557A (en) * | 1964-05-11 | 1967-05-30 | Ncr Co | Thermo-copy system |
US3332557A (en) * | 1964-05-26 | 1967-07-25 | Pall Corp | Wire mesh filter element with anchoring rim |
US3382985A (en) * | 1966-01-04 | 1968-05-14 | Pabst Brewing Co | Filter elements having integral gasket means |
US3310098A (en) * | 1966-08-12 | 1967-03-21 | Universal Oil Prod Co | Catalytic infra-red heater |
US4422861A (en) * | 1982-02-05 | 1983-12-27 | American Optical Corporation | Aerosol filter cartridge |
US4497709A (en) * | 1982-09-03 | 1985-02-05 | Albany International Corp. | Two piece screen filter |
US4601820A (en) * | 1984-03-23 | 1986-07-22 | Filtertek, Inc. | Low-profile inline filter |
US4740413A (en) * | 1986-11-07 | 1988-04-26 | Lenser Verwaltungs-Gmbh | Bonded synthetic-resin filter plate and method of making same |
US4961849A (en) * | 1988-12-19 | 1990-10-09 | Hull Harold L | Magnetically attached filter |
US4986904A (en) * | 1988-12-20 | 1991-01-22 | Schleicher & Schuell Gmbh | Color coded disposable filter holder |
US5102436A (en) * | 1990-10-03 | 1992-04-07 | Andreas Stihl | Prefilter for an air filter of an internal combustion engine |
US5169524A (en) * | 1990-11-27 | 1992-12-08 | Horst Meiritz | Filter ring |
US5651888A (en) * | 1992-12-16 | 1997-07-29 | Kubota Corporation | Filtration membrane cartridge |
US5599449A (en) * | 1994-10-21 | 1997-02-04 | Robert Bosch Gmbh | Tubular elastic frame with a continuous slot spanned by a filter material |
US5690826A (en) * | 1996-05-10 | 1997-11-25 | Cravello; William Myron | Shaker screen assembly |
Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6662955B1 (en) * | 1998-08-11 | 2003-12-16 | Food Equipment Technologies Company Inc. | Beverage ingredient filter and assembly |
US20030042179A1 (en) * | 1998-10-30 | 2003-03-06 | Adams Thomas C. | Vibratory separator screens |
US6843379B2 (en) | 1999-09-14 | 2005-01-18 | Outokumpu Oyj | Corrosion-resistant filter element |
FR2822082A1 (en) * | 2001-03-14 | 2002-09-20 | Filtrauto | Fluid filter system with interchangeable cartridge has surround with sealing surface having relief motif matching same on support |
JP2004531393A (en) * | 2001-06-29 | 2004-10-14 | ミリポア・コーポレイション | Laminated edge filter structure and method of manufacturing the same |
US20030000874A1 (en) * | 2001-06-29 | 2003-01-02 | Stephen Proulx | Laminated edge filter structure and method of making |
WO2003002239A2 (en) * | 2001-06-29 | 2003-01-09 | Millipore Corporation | Laminated edge filter structure and method of making |
WO2003002239A3 (en) * | 2001-06-29 | 2004-02-12 | Millipore Corp | Laminated edge filter structure and method of making |
US20040188042A1 (en) * | 2002-02-06 | 2004-09-30 | Andersen Corporation | Reduced visibility insect screen |
US20080121355A1 (en) * | 2002-02-06 | 2008-05-29 | Russell John Pylkki | Reduced Visibility Insect Screen |
US20050178512A1 (en) * | 2002-02-06 | 2005-08-18 | Andersen Corporation | Reduced visibility insect screen |
US8042598B2 (en) | 2002-02-06 | 2011-10-25 | Andersen Corporation | Reduced visibility insect screen |
US20050241784A1 (en) * | 2002-02-06 | 2005-11-03 | Andersen Corporation | Reduced visibility insect screen |
US20050098277A1 (en) * | 2002-02-06 | 2005-05-12 | Alex Bredemus | Reduced visibility insect screen |
US20050121153A1 (en) * | 2002-02-06 | 2005-06-09 | Andersen Corporation | Reduced visibility insect screen |
US20050139330A1 (en) * | 2002-02-06 | 2005-06-30 | Pylkki Russell J. | Reduced visibility insect screen |
US7514030B2 (en) | 2002-12-30 | 2009-04-07 | Albany International Corp. | Fabric characteristics by flat calendering |
US20040154148A1 (en) * | 2002-12-30 | 2004-08-12 | Anders Nilsson | Papermaker's and other industrial process fabric characteristics by calendering |
US20080289780A1 (en) * | 2003-03-31 | 2008-11-27 | Mcgregor Gordon L | Durable Insect Screen With Improved Optical Properties |
US20040192129A1 (en) * | 2003-03-31 | 2004-09-30 | Mcgregor Gordon L. | Insect screen with improved optical properties |
US20060148347A1 (en) * | 2003-03-31 | 2006-07-06 | Mcgregor Gordon L | Insect screen with improved optical properties |
US20060160445A1 (en) * | 2003-03-31 | 2006-07-20 | Mcgregor Gordon L | Insect screen with improved optical properties |
US20060169426A1 (en) * | 2003-03-31 | 2006-08-03 | Mcgregor Gordon L | Durable insect screen with improved optical properties |
US20040198115A1 (en) * | 2003-03-31 | 2004-10-07 | Mcgregor Gordon L. | Insect screen with improved optical properties |
WO2004088078A3 (en) * | 2003-03-31 | 2005-12-08 | Gore Enterprise Holdings Inc | Insect screen with improved optical properties |
US7096627B2 (en) * | 2003-10-24 | 2006-08-29 | Rodney George Wade | Rain head |
US20050086883A1 (en) * | 2003-10-24 | 2005-04-28 | Wade Rodney G. | Rain head |
US7416577B2 (en) * | 2004-06-17 | 2008-08-26 | Randy Simmons | Air intake filter screen assembly including a stand-off frame for preventing hail damage to surface coils of an associated air intake unit |
US20050279065A1 (en) * | 2004-06-17 | 2005-12-22 | Randy Simmons | Air intake filter screen assembly including a stand-off frame for preventing hail damage to surface coils of an associated air intake unit |
US20060016744A1 (en) * | 2004-07-20 | 2006-01-26 | Miner Daniel P | Pump inlet screen |
US7063791B2 (en) | 2004-07-20 | 2006-06-20 | Miner Daniel P | Pump inlet screen |
US8048319B2 (en) * | 2005-10-05 | 2011-11-01 | Enercon Services, Inc. | Filter medium for strainers used in nuclear reactor emergency core cooling systems |
US20100025315A1 (en) * | 2005-10-05 | 2010-02-04 | James Aaron Smith | Filter medium for strainers used in nuclear reactor emergency core cooling systems |
US7584908B2 (en) * | 2005-10-27 | 2009-09-08 | Sta-Rite Industries, Llc | Spray nozzle apparatus and method |
US20070095956A1 (en) * | 2005-10-27 | 2007-05-03 | Swan Trevor W | Spray nozzle apparatus and method |
US20120107507A1 (en) * | 2006-06-30 | 2012-05-03 | Helmy Nashat N | Method of manufacturing a sifting screen |
US10040149B2 (en) * | 2011-08-09 | 2018-08-07 | The Newway Company, Inc. | Assembly, kit and method for securing a covering to an air intake face |
US20160052095A1 (en) * | 2011-08-09 | 2016-02-25 | Randy Simmons | Assembly, kit and method for securing a covering to an air intake face |
CN104105908A (en) * | 2012-01-25 | 2014-10-15 | Nok株式会社 | Metal substrate gasket with filter function and manufacturing method therefor |
EP2808584A4 (en) * | 2012-01-25 | 2015-08-19 | Nok Corp | Metal substrate gasket with filter function and manufacturing method therefor |
CN109276922B (en) * | 2018-09-14 | 2020-09-08 | 浙江万华不锈钢有限公司 | Modular single face stainless steel filter |
CN109276922A (en) * | 2018-09-14 | 2019-01-29 | 浙江万华不锈钢有限公司 | A kind of combined single-side stainless steel filter plate |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5873999A (en) | Sieving and filtration screen | |
EP1002588B1 (en) | Panel for a screen | |
FI70527B (en) | WITHOUT FILTER | |
CA2374077A1 (en) | Papermaking belt | |
DE19635933A1 (en) | Filter device | |
EP0127192B1 (en) | Apparatus for producing perforated plastic film | |
DE10100692B4 (en) | Decorative film with 3-D effect and process for its production | |
CA2373929A1 (en) | Process and apparatus for making papermaking belt using extrusion | |
DE69501405D1 (en) | PERFORATED SCREEN PRINT TEMPLATE FOR APPLYING AND DOSING MORE OR LESS THICK LAYERS OF A VISCOSE PRODUCT | |
US4880448A (en) | Double filter insert for an air cleaning apparatus | |
EP0426845B1 (en) | Dustproof cap | |
EP0529111B1 (en) | Filter element | |
US5003870A (en) | Antistretch screen printing arrangement | |
JPH1028825A (en) | Cut filter material | |
CA2464415A1 (en) | Scrub pad with printed rigid plates and associated methods | |
DE20005170U1 (en) | Disc-like cosmetic pad | |
ATE189192T1 (en) | GERMAN PROTECTION FOR HOUSEHOLD WATER FILTER SCREEN INSERTS | |
JP4116766B2 (en) | Spunlaced nonwoven fabric with design pattern, mesh belt for manufacturing spunlace nonwoven fabric with design pattern, and manufacturing method thereof | |
US5775914A (en) | Drawing apparatus | |
EP0816101A2 (en) | Process for the production of a foam body for ink cartridge | |
DE69834030T2 (en) | ECOLOGICAL DOCUMENT FOR COMPUTER MOUSE COMPRISING MULTIPLE IMAGES PRINTED EASILY DISPOSABLE COATINGS | |
JPH04146714A (en) | Cleaning wiper | |
EP0243163A1 (en) | Towel or mat | |
EP0911140A3 (en) | Filter element for plastic melts | |
JP2004314008A (en) | Net for absorbing dust or the like |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TETKO, INC., KENTUCKY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GAISER, RICHARD M.;REEL/FRAME:008780/0473 Effective date: 19970828 |
|
AS | Assignment |
Owner name: SEFAR AMERICA INC., NEW YORK Free format text: CHANGE OF NAME;ASSIGNOR:TETKO INC.;REEL/FRAME:009585/0398 Effective date: 19981005 |
|
REMI | Maintenance fee reminder mailed | ||
FPAY | Fee payment |
Year of fee payment: 4 |
|
SULP | Surcharge for late payment | ||
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Expired due to failure to pay maintenance fee |
Effective date: 20070223 |